I'm looking to upgrade to some real reef lighting for my 55gal.I'd prefer something that sits on the aquarium instead of a hangover but I'm not too perticular.I did find a good deal on a 4bulb t5 hangover .I'm just not sure if they provide enough light(would have to check output)but would like to be able to grow most corals.If anyone has any advice or lights that might suit me let me know .thanks